Is using your cellphone dangerous? Cellphones placed next to your head do increase neuron activity. But is that a bad thing? Who knows. Dr Fitness thinks there is something to this so he uses a crazy headset that looks like it is out of the movie Sleeper to give him protection from these supposedly harmful rays. Sure he can’t hear his calls that well but he thinks he is protecting that precious brain of his from cellphone radiation. So that makes him feel better. Other simpler things you can do are: use a headset, use the speaker system in your car and text instead of talk.